Golang Http POST 发送PB数据

func ProtoWrite() {
     p1 := &behavior.Picture{
         Filename: "kk",
         Relpath:  "d:/1024",
         Clicks:   100,
     }
     ps := &behavior.Pictures{
         Pic: p1,
     }
     data, err := proto.Marshal(ps)
     if err != nil {
         log.Fatalf("ProtoBuf 数据编码失败->%v\n", err.Error())
     }
     contentType := "application/json;charset=utf-8"
     url := "http://192.168.100.101:8081/index/index"
     body := bytes.NewBuffer(data)
     res, err := http.Post(url, contentType, body)
     if err != nil {
         log.Panic("http post failed")
     }
 result, err := ioutil.ReadAll(res.Body) 
res.Body.Close() 
log.Println(result) log.Println(string(result))
 }